A carregar...
Publicação
The impact of some microcystins on the growth of heterotrophic bacteria from Portuguese freshwater reservoir
| Nome: | Descrição: | Tamanho: | Formato: | |
|---|---|---|---|---|
| 421.94 KB | Adobe PDF |
Autores
Orientador(es)
Resumo(s)
Microcystins (MCs) are hepatotoxins that are abundantly produced by cyanobacteria. Studies have shown that these toxins
affect many multicellular organisms that inhabit aquatic ecosystems; however, their impact on bacteria that co-occur with
freshwater cyanobacteria is still unclear.
In this study, the impact of the three most common variants of MCs (MCLR, MCRR, and MCYR) on the growth of
heterotrophic bacteria isolated from four Portuguese reservoirs was evaluated. Some isolates were derived from freshwater
sources where blooms of cyanobacteria that often contain microcystin-producing strains are frequently observed and from a
reservoir where these phenomena do not occur. Morphological and molecular characterisation of the bacterial isolates was
performed, and these bacteria were exposed to three different concentrations of each MC variant. The effect of MCs on
bacterial growth was then evaluated.
This study showed that MCLR, MCRR and MCYR can reduce the growth of some heterotrophic bacteria isolated from
freshwater sources. To our knowledge, this is the first study in which the impact of several variants of MCs was evaluated in a
diverse group of freshwater heterotrophic bacteria.
Descrição
Publicaciones del III Congreso Ibérico de Cianotoxinas (Blanes, 2013)
Palavras-chave
Microcystin-LR Growth Inhibition Microcystin-RR Microcystin-YR Heterotrophic Bacteria Água e Solo
Contexto Educativo
Citação
Limnetica. 2015:34(1):215-26.